ASTM-C538 Standard Test Method for Color Retention of Red, Orange, and Yellow Porcelain Enamels

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Standard Test Method for Color Retention of Red, Orange, and Yellow Porcelain Enamels



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1.1 This test method2 covers only porcelain enamels containing the cadmium-sulfide or cadmium sulfo-selenide types of pigments. The purpose of the test is to detect those red, yellow, orange, and some green porcelain enamels that are likely to experience appreciable color changes upon exposure to atmospheric corrosion.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

3.1 Correlation between results of this test and outdoor exposure tests of porcelain enamels colored with cadmium sulfo-selenide pigment shows that the cupric sulfate test is an effective indicator of the tendency for such coatings to experience appreciable color changes during weathering. The cupric sulfate test is considered useful for specification acceptance, quality control, and research and development purposes.


color retention; porcelain enamel; red, orange, and yellow cadmium sulfo-selenide pigments;; ICS Number Code 25.220.50 (Enamels)

To find similar documents by ASTM Volume:

02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)

To find similar documents by classification:

25.220.50 (Enamels)

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Document Number


Revision Level

1983 R18 EDITION



Modification Type


Publication Date

Oct. 1, 2018

Document Type

Test Method

Page Count

2 pages

Committee Number